It would be neat to list which expanders are available for the current modules when editing a rack/viewing a module.
-- bofh

+1 on that. Granted, the expander info is in the module descriptions in a lot of these cases, but having an in-page link to the expander from its "parent" module would actually be pretty helpful. For one thing, it would clarify that there IS an expander in the first place, but I think it would also help with giving builders a clearer set of options about those expanders. The only drawback is that it would involve a lot of scrambling around in the database and setting up links, but this may well be worth the effort.